IEC 60974-7:2019 specifies safety and construction requirements for torches used for arc welding and allied processes. This document is applicable to manual, mechanically guided, air-cooled, liquid-cooled, motorized, spool-on and fume extraction torches.
This fourth edition cancels and replaces the third edition published in 2013 and constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) definitions 3.11 and 3.20 were revised,
b) requirements for arc striking and stabilizing voltage rating have been added to the sequence of type tests (see 6.2),
c) the AC test voltage requirement for torches that utilize arc striking and stabilizing voltageshas been revised (see 7.5.2),
d) the test configuration of isolated circuits for torches that utilize arc striking and stabilizing voltages has been revised (see 7.5.2),
e) the metal tube used for the heating tests has additional allowable means of cooling methods (see 8.3.2 and 8.3.5),
f) for fume extraction torches, the instructions for use include additional information (see Clause 13, item i)).
This document is to be used in conjunction with IEC 60974-1:2017.